Top Data Engineer Interview Questions

Review this list of 167 Data Engineer interview questions and answers verified by hiring managers and candidates.

+ Share interview

Given a large set of CSV files with thousands of paragraphs each, how would you detect duplicates within each file, and how would you scale this solution for many files?
Data Engineer
Coding
1 answer
"My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."
Payal B. - "My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."See full answer
Data Engineer
Coding
Asked at Meta • 2 months ago
Given a list of strings, find the number of occurrences of the second letter of the first word, and return the character and its count.
Data Engineer
Data Structures & Algorithms
+1 more
Add answer
Data Engineer
Data Structures & Algorithms
+1 more
Asked at Meta • 2 months ago
Given a stream of Uber ride requests, compute the number of ride requests in every 15-minute window.
Data Engineer
Data Structures & Algorithms
+1 more
Add answer
Data Engineer
Data Structures & Algorithms
+1 more
Asked at Meta • 7 months ago
What would you do when there is a customer drop or a specific metric drop in the dashboard for an Instagram-like product?
Data Engineer
Analytical
+1 more
Add answer
Data Engineer
Analytical
+1 more
Asked at Meta • 2 months ago
Given a library-style schema with books, users, and check-in/check-out data, write a query to find for each user the number of books they checked out and did not return before the due date, and ret...
Data Engineer
SQL
Add answer
Data Engineer
SQL

🧠 Want an expert answer to a question? Saving questions lets us know what content to make next.

Asked at Meta • 2 months ago
Given users, books, and checkout data, find the number of users who checked out books in the geography category grouped by age.
Data Engineer
Data Analysis
+1 more
Add answer
Data Engineer
Data Analysis
+1 more
Asked at Meta • 2 months ago
Given employee, department, and salary data stored in a dictionary, find the second maximum salary for each department.
Data Engineer
Data Structures & Algorithms
+1 more
Add answer
Data Engineer
Data Structures & Algorithms
+1 more

Showing 161-167 of 167

Interviewed recently?

Help improve our question database (and earn karma) by telling us about your experience

+ Share interview experience

Trending companies

Apple

Walmart Labs

Top Data Engineer Interview Questions

Given a large set of CSV files with thousands of paragraphs each, how would you detect duplicates within each file, and how would you scale this solution for many files?

Given a list of strings, find the number of occurrences of the second letter of the first word, and return the character and its count.

Given a stream of Uber ride requests, compute the number of ride requests in every 15-minute window.

What would you do when there is a customer drop or a specific metric drop in the dashboard for an Instagram-like product?

Given a library-style schema with books, users, and check-in/check-out data, write a query to find for each user the number of books they checked out and did not return before the due date, and ret...

Given users, books, and checkout data, find the number of users who checked out books in the geography category grouped by age.

Given employee, department, and salary data stored in a dictionary, find the second maximum salary for each department.

Explore questions by company

Explore questions by role

Follow Us

Products

Courses

Interview Questions

Interview Experiences

Popular articles

Guides

Coaching

For Partners

Company